next(1,2).
next(2,3).
next(3,4).
next(4,5).
next(5,6).
next(6,7).
next(7,8).
next(8,9).
next(9,10).
next(10,11).
next(11,12).
next(6,13).
next(13,14).
next(14,15).
next(15,16).
next(16,17).
next(17,18).
next(18,19).
next(19,20).
next(20,21).
next(21,22).
next(22,23).
next(23,24).
next(24,25).
next(25,26).
next(26,27).
next(27,28).
next(23,29).
next(29,30).
next(30,31).
next(31,32).
next(32,33).
next(33,34).
next(22,35).
next(35,36).
next(36,37).
next(37,38).
next(38,39).
next(39,40).
next(40,41).
next(41,42).
next(42,43).
next(38,44).
next(44,45).
next(45,46).
next(46,47).
next(47,48).
doAt(startflow,5).
doAt(a8,6).
doAt(a11,8).
doAt(a6,10).
doAt(endflow,11).
doAt(a3,14).
doAt(a5,15).
doAt(a19,17).
doAt(a16,18).
doAt(a12,19).
doAt(a17,20).
doAt(a1,21).
doAt(a25,22).
doAt(a4,23).
doAt(a13,24).
doAt(endflow,27).
doAt(a7,29).
doAt(a15,30).
doAt(a20,31).
doAt(a23,32).
doAt(endflow,33).
doAt(a18,35).
doAt(a24,37).
doAt(a10,38).
doAt(a9,39).
doAt(a21,40).
doAt(endflow,42).
doAt(a14,44).
doAt(a22,45).
doAt(a21,46).
doAt(endflow,47).
compAt(a11,x1,13).
compAt(a11,x23,16).
compAt(a11,x20,25).
compAt(a6,x8,26).
compAt(a6,x8,36).
compAt(a11,x20,41).
subsAt(a11,7).
subsAt(a6,9).
leftrightnexts(24,29).
leftrightnexts(39,44).
leftrightnexts(23,35).
leftrightnexts(7,13).